Report on the Automatic Telephone Situation in the City of Chicago Submitted To The Committee on Gas, oil, and Electric Light
Chicago: Kempster B Miller 1915. First Edition. ii, 63 pages. Grey printed wrappers. Very Good. Wraps. 
The consulting engineer Kempster has been retained by the city of Chicago to determine technical alternatives to the Automatic Telephone Situation as operated at that time by the Illinois Telephone and Telegraph Company. He traces the history of service until the present time (1915), evaluates the state of the exchanges, and makes recommendations - one one hand, scrap it. On the other, attempt a sale to another operating company (AT&T). The data provides an interesting window into "state of the art" in Chicago's telephone infrastructure, and the problems facing large metro areas.